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  • Title: Transimpedance Matrix (TIM) Measurement for the Detection of Intraoperative Electrode Tip Foldover Using the Slim Modiolar Electrode: A Proof of Concept Study.
    Author: Klabbers TM, Huinck WJ, Heutink F, Verbist BM, Mylanus EAM.
    Journal: Otol Neurotol; 2021 Feb 01; 42(2):e124-e129. PubMed ID: 32941298.
    Abstract:
    OBJECTIVES: The aim of this study is to report on our preliminary experience with Transimpedance Matrix (TIM)-measurement for the detection of cochlear implant electrode tip foldovers compared with intraoperative imaging in patients implanted with the slim modiolar electrode (SME). STUDY DESIGN: Proof of concept study. SETTING: Tertiary university referral center. PATIENTS: Twenty five ears (in 22 patients) implanted consecutively with the SME. INTERVENTIONS: Following cochlear implantation, intraoperative TIM-measurement and fluoroscopy were performed. One week postoperatively, the electrode position was evaluated using Computed Tomography (CT)-imaging. MAIN OUTCOME MEASURES: Electrode array tip foldover. RESULTS: Electrode array tip foldover occurred in three of the 25 cochlear implantations performed (12%). In each case, the foldover was detected by both TIM and fluoroscopy, leading to reposition and correct intracochlear placement of the array. CONCLUSIONS: TIM-measurement is a promising method for the intraoperative detection of an electrode array tip foldover. The TIM-tool with intuitive heatmap display is easy to use, fast, and readily available to clinics using TIM-software in the operating theatre.
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